forked from ryanmwangi/CalMerger
refactor:streamlined server file
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173
server.js
173
server.js
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@ -1,183 +1,14 @@
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import express from 'express';
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import ICAL from 'ical.js';
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import fs from 'fs';
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import axios from 'axios';
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import path from 'path';
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import routes from './src/routes.js';
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const app = express();
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app.use(express.json());
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const MERGED_CALENDARS_DIR = path.join(process.cwd(), 'calendar');
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console.log(`Merged calendars directory: ${MERGED_CALENDARS_DIR} under ${process.cwd()}`);
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// Ensure the merged calendars directory exists
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fs.mkdirSync(MERGED_CALENDARS_DIR, { recursive: true });
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// Serve static files from the 'public' directory
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app.use(express.static(path.join(process.cwd(), 'public')));
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app.use('/', routes);
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// Utility to sanitize filenames
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const sanitizeFilename = (filename) => filename.replace(/[<>:"/\\|?* ]/g, '_');
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// Fetch calendar data from URL or file
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async function fetchCalendarData(calendar) {
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const isFilePath = !calendar.url.startsWith('http');
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try {
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if (isFilePath) {
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console.log(`Fetching calendar data from file: ${calendar.url}`);
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return {
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data: fs.readFileSync(path.resolve(calendar.url), 'utf-8'),
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...calendar
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};
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} else {
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console.log(`Fetching calendar data from URL: ${calendar.url}`);
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const response = await axios.get(calendar.url);
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return { data: response.data, ...calendar };
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}
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} catch (error) {
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console.error(`Error retrieving calendar from ${calendar.url}:`, error.message);
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throw error;
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}
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}
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// Create a top-level VCALENDAR component
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function createCalendarComponent(name) {
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console.log(`Creating calendar component for: ${name}`);
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const calendarComponent = new ICAL.Component(['vcalendar', [], []]);
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calendarComponent.updatePropertyWithValue('prodid', '-//Your Product ID//EN');
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calendarComponent.updatePropertyWithValue('version', '2.0');
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calendarComponent.updatePropertyWithValue('name', name); // calendar name
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return calendarComponent;
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}
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// Add events to the calendar component
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function addEventsToCalendar(calendarComponent, results) {
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console.log(`Adding events to calendar component.`);
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results.forEach((result) => {
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// console.log(result.data);
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const parsed = ICAL.parse(result.data);
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const component = new ICAL.Component(parsed);
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component.getAllSubcomponents('vevent').forEach((event) => {
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const vevent = new ICAL.Event(event);
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const newEvent = new ICAL.Component('vevent');
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console.log(`Adding event: ${vevent.summary} to calendar.`);
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// Get start and end dates directly
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const startDate = vevent.startDate && ICAL.Time.fromJSDate(vevent.startDate.toJSDate());
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const endDate = vevent.endDate && ICAL.Time.fromJSDate(vevent.endDate.toJSDate());
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// Log the start and end dates
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console.log(`Start Date: ${startDate}`);
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console.log(`End Date: ${endDate}`);
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// // Check if the dates are valid
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// if (!startDate || !endDate || !startDate.isValid() || !endDate.isValid()) {
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// console.warn(`Invalid date for event: ${vevent.summary}`);
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// return; // Skip or handle accordingly
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// }
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newEvent.updatePropertyWithValue('uid', vevent.uid);
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newEvent.updatePropertyWithValue('summary', result.override ? result.prefix : `${result.prefix} ${vevent.summary}`);
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newEvent.updatePropertyWithValue('dtstart', startDate);
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newEvent.updatePropertyWithValue('dtend', endDate);
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calendarComponent.addSubcomponent(newEvent);
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});
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});
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}
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// Save calendar data to file
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function saveCalendarFile(filename, content) {
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const filePath = path.join(MERGED_CALENDARS_DIR, filename);
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console.log(`Saving calendar data to file: ${filePath}`);
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fs.writeFileSync(filePath, content);
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return filePath;
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}
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// Merge calendars endpoint
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app.post('/merge', async (req, res) => {
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const { linkGroupName, calendars } = req.body;
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// Validate the input
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if (!linkGroupName || !Array.isArray(calendars) || calendars.length === 0) {
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console.warn('Invalid input provided for merge endpoint.');
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return res.status(400).json({ error: 'Invalid input. Please provide a linkGroupName and at least one calendar.' });
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}
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try {
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// Sanitize the linkGroupName to create a valid filename
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console.log(`Merging calendars for group: ${linkGroupName}`);
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const sanitizedLinkGroupName = sanitizeFilename(linkGroupName);
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const filename = `${sanitizedLinkGroupName}.ics`;
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// Fetch calendar data
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const results = await Promise.all(calendars.map(fetchCalendarData));
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// Generate merged calendar using ical.js
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const calendarComponent = createCalendarComponent(linkGroupName);
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addEventsToCalendar(calendarComponent, results);
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// Save the calendar to a file
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saveCalendarFile(filename, calendarComponent.toString());
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// Save the user input and sanitizedLinkGroupName in a separate JSON file
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saveCalendarFile(`${sanitizedLinkGroupName}.json`, JSON.stringify({ linkGroupName, calendars }, null, 2));
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res.json({ url: `${req.protocol}://${req.get('host')}/calendar/${sanitizedLinkGroupName}` });
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} catch (error) {
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console.error('Error merging calendars:', error.message);
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res.status(500).json({ error: 'Failed to merge calendars' });
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}
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});
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// Refresh calendar if outdated
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async function refreshCalendarData(calendarName) {
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const jsonFilePath = path.join(MERGED_CALENDARS_DIR, `${calendarName}.json`);
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console.log(`Refreshing calendar data for: ${calendarName}`);
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// Read the JSON file to get the source URL and other details
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const { calendars } = JSON.parse(fs.readFileSync(jsonFilePath, 'utf-8'));
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const results = await Promise.all(calendars.map(fetchCalendarData));
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const calendarComponent = createCalendarComponent(calendarName);
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addEventsToCalendar(calendarComponent, results);
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saveCalendarFile(`${calendarName}.ics`, calendarComponent.toString());
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console.log('Calendar data refreshed and saved.');
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}
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// Serve the merged calendar file and refresh if older than an hour
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app.get('/calendar/:name', async (req, res) => {
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const calendarName = req.params.name;
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const icsFilePath = path.join(MERGED_CALENDARS_DIR, `${calendarName}.ics`);
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try {
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// Check if the .ics file exists
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console.log(`Serving calendar for: ${calendarName}`);
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if (fs.existsSync(icsFilePath)) {
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const stats = fs.statSync(icsFilePath);
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const isOutdated = new Date() - new Date(stats.mtime) > 60 * 60 * 1000;
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if (isOutdated){
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console.log(`Calendar ${calendarName} is outdated. Refreshing...`);
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await refreshCalendarData(calendarName);
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}
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res.setHeader('Content-Type', 'text/calendar');
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res.sendFile(icsFilePath);
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} else {
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res.status(404).json({ error: 'Calendar not found.' });
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}
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} catch (error) {
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console.error('Error retrieving calendar data:', error.message);
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res.status(500).json({ error: 'Failed to retrieve calendar data.' });
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}
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});
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export default app;
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